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1 | /* |
2 | * IBM Ultimotion Video Decoder | |
3 | * Copyright (C) 2004 Konstantin Shishkov | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * IBM Ultimotion Video Decoder. | |
25 | */ | |
26 | ||
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | ||
31 | #include "avcodec.h" | |
32 | #include "bytestream.h" | |
33 | #include "internal.h" | |
34 | ||
35 | #include "ulti_cb.h" | |
36 | ||
37 | typedef struct UltimotionDecodeContext { | |
38 | AVCodecContext *avctx; | |
39 | int width, height, blocks; | |
40 | AVFrame *frame; | |
41 | const uint8_t *ulti_codebook; | |
42 | GetByteContext gb; | |
43 | } UltimotionDecodeContext; | |
44 | ||
45 | static av_cold int ulti_decode_init(AVCodecContext *avctx) | |
46 | { | |
47 | UltimotionDecodeContext *s = avctx->priv_data; | |
48 | ||
49 | s->avctx = avctx; | |
50 | s->width = avctx->width; | |
51 | s->height = avctx->height; | |
52 | s->blocks = (s->width / 8) * (s->height / 8); | |
53 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; | |
54 | s->ulti_codebook = ulti_codebook; | |
55 | ||
56 | s->frame = av_frame_alloc(); | |
57 | if (!s->frame) | |
58 | return AVERROR(ENOMEM); | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static av_cold int ulti_decode_end(AVCodecContext *avctx){ | |
64 | UltimotionDecodeContext *s = avctx->priv_data; | |
65 | ||
66 | av_frame_free(&s->frame); | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | static const int block_coords[8] = // 4x4 block coords in 8x8 superblock | |
72 | { 0, 0, 0, 4, 4, 4, 4, 0}; | |
73 | ||
74 | static const int angle_by_index[4] = { 0, 2, 6, 12}; | |
75 | ||
76 | /* Lookup tables for luma and chroma - used by ulti_convert_yuv() */ | |
77 | static const uint8_t ulti_lumas[64] = | |
78 | { 0x10, 0x13, 0x17, 0x1A, 0x1E, 0x21, 0x25, 0x28, | |
79 | 0x2C, 0x2F, 0x33, 0x36, 0x3A, 0x3D, 0x41, 0x44, | |
80 | 0x48, 0x4B, 0x4F, 0x52, 0x56, 0x59, 0x5C, 0x60, | |
81 | 0x63, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C, | |
82 | 0x7F, 0x83, 0x86, 0x8A, 0x8D, 0x91, 0x94, 0x98, | |
83 | 0x9B, 0x9F, 0xA2, 0xA5, 0xA9, 0xAC, 0xB0, 0xB3, | |
84 | 0xB7, 0xBA, 0xBE, 0xC1, 0xC5, 0xC8, 0xCC, 0xCF, | |
85 | 0xD3, 0xD6, 0xDA, 0xDD, 0xE1, 0xE4, 0xE8, 0xEB}; | |
86 | ||
87 | static const uint8_t ulti_chromas[16] = | |
88 | { 0x60, 0x67, 0x6D, 0x73, 0x7A, 0x80, 0x86, 0x8D, | |
89 | 0x93, 0x99, 0xA0, 0xA6, 0xAC, 0xB3, 0xB9, 0xC0}; | |
90 | ||
91 | /* convert Ultimotion YUV block (sixteen 6-bit Y samples and | |
92 | two 4-bit chroma samples) into standard YUV and put it into frame */ | |
93 | static void ulti_convert_yuv(AVFrame *frame, int x, int y, | |
94 | uint8_t *luma,int chroma) | |
95 | { | |
96 | uint8_t *y_plane, *cr_plane, *cb_plane; | |
97 | int i; | |
98 | ||
99 | y_plane = frame->data[0] + x + y * frame->linesize[0]; | |
100 | cr_plane = frame->data[1] + (x / 4) + (y / 4) * frame->linesize[1]; | |
101 | cb_plane = frame->data[2] + (x / 4) + (y / 4) * frame->linesize[2]; | |
102 | ||
103 | cr_plane[0] = ulti_chromas[chroma >> 4]; | |
104 | ||
105 | cb_plane[0] = ulti_chromas[chroma & 0xF]; | |
106 | ||
107 | ||
108 | for(i = 0; i < 16; i++){ | |
109 | y_plane[i & 3] = ulti_lumas[luma[i]]; | |
110 | if((i & 3) == 3) { //next row | |
111 | y_plane += frame->linesize[0]; | |
112 | } | |
113 | } | |
114 | } | |
115 | ||
116 | /* generate block like in MS Video1 */ | |
117 | static void ulti_pattern(AVFrame *frame, int x, int y, | |
118 | int f0, int f1, int Y0, int Y1, int chroma) | |
119 | { | |
120 | uint8_t Luma[16]; | |
121 | int mask, i; | |
122 | for(mask = 0x80, i = 0; mask; mask >>= 1, i++) { | |
123 | if(f0 & mask) | |
124 | Luma[i] = Y1; | |
125 | else | |
126 | Luma[i] = Y0; | |
127 | } | |
128 | ||
129 | for(mask = 0x80, i = 8; mask; mask >>= 1, i++) { | |
130 | if(f1 & mask) | |
131 | Luma[i] = Y1; | |
132 | else | |
133 | Luma[i] = Y0; | |
134 | } | |
135 | ||
136 | ulti_convert_yuv(frame, x, y, Luma, chroma); | |
137 | } | |
138 | ||
139 | /* fill block with some gradient */ | |
140 | static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int angle) | |
141 | { | |
142 | uint8_t Luma[16]; | |
143 | if(angle & 8) { //reverse order | |
144 | int t; | |
145 | angle &= 0x7; | |
146 | t = Y[0]; | |
147 | Y[0] = Y[3]; | |
148 | Y[3] = t; | |
149 | t = Y[1]; | |
150 | Y[1] = Y[2]; | |
151 | Y[2] = t; | |
152 | } | |
153 | switch(angle){ | |
154 | case 0: | |
155 | Luma[0] = Y[0]; Luma[1] = Y[1]; Luma[2] = Y[2]; Luma[3] = Y[3]; | |
156 | Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3]; | |
157 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3]; | |
158 | Luma[12] = Y[0]; Luma[13] = Y[1]; Luma[14] = Y[2]; Luma[15] = Y[3]; | |
159 | break; | |
160 | case 1: | |
161 | Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3]; | |
162 | Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3]; | |
163 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3]; | |
164 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2]; | |
165 | break; | |
166 | case 2: | |
167 | Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3]; | |
168 | Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3]; | |
169 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2]; | |
170 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2]; | |
171 | break; | |
172 | case 3: | |
173 | Luma[0] = Y[2]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3]; | |
174 | Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3]; | |
175 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2]; | |
176 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[1]; | |
177 | break; | |
178 | case 4: | |
179 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3]; | |
180 | Luma[4] = Y[2]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[2]; | |
181 | Luma[8] = Y[1]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[1]; | |
182 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0]; | |
183 | break; | |
184 | case 5: | |
185 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[2]; | |
186 | Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[1]; | |
187 | Luma[8] = Y[2]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[0]; | |
188 | Luma[12] = Y[1]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0]; | |
189 | break; | |
190 | case 6: | |
191 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[2]; | |
192 | Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[1]; | |
193 | Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0]; | |
194 | Luma[12] = Y[1]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0]; | |
195 | break; | |
196 | case 7: | |
197 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[1]; | |
198 | Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[0]; | |
199 | Luma[8] = Y[3]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0]; | |
200 | Luma[12] = Y[2]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0]; | |
201 | break; | |
202 | default: | |
203 | Luma[0] = Y[0]; Luma[1] = Y[0]; Luma[2] = Y[1]; Luma[3] = Y[1]; | |
204 | Luma[4] = Y[0]; Luma[5] = Y[0]; Luma[6] = Y[1]; Luma[7] = Y[1]; | |
205 | Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[3]; Luma[11] = Y[3]; | |
206 | Luma[12] = Y[2]; Luma[13] = Y[2]; Luma[14] = Y[3]; Luma[15] = Y[3]; | |
207 | break; | |
208 | } | |
209 | ||
210 | ulti_convert_yuv(frame, x, y, Luma, chroma); | |
211 | } | |
212 | ||
213 | static int ulti_decode_frame(AVCodecContext *avctx, | |
214 | void *data, int *got_frame, | |
215 | AVPacket *avpkt) | |
216 | { | |
217 | const uint8_t *buf = avpkt->data; | |
218 | int buf_size = avpkt->size; | |
219 | UltimotionDecodeContext *s=avctx->priv_data; | |
220 | int modifier = 0; | |
221 | int uniq = 0; | |
222 | int mode = 0; | |
223 | int blocks = 0; | |
224 | int done = 0; | |
225 | int x = 0, y = 0; | |
226 | int i, ret; | |
227 | int skip; | |
228 | int tmp; | |
229 | ||
230 | if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) | |
231 | return ret; | |
232 | ||
233 | bytestream2_init(&s->gb, buf, buf_size); | |
234 | ||
235 | while(!done) { | |
236 | int idx; | |
237 | if(blocks >= s->blocks || y >= s->height) | |
238 | break;//all blocks decoded | |
239 | ||
240 | if (bytestream2_get_bytes_left(&s->gb) < 1) | |
241 | goto err; | |
242 | idx = bytestream2_get_byteu(&s->gb); | |
243 | if((idx & 0xF8) == 0x70) { | |
244 | switch(idx) { | |
245 | case 0x70: //change modifier | |
246 | modifier = bytestream2_get_byte(&s->gb); | |
247 | if(modifier>1) | |
248 | av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier); | |
249 | break; | |
250 | case 0x71: // set uniq flag | |
251 | uniq = 1; | |
252 | break; | |
253 | case 0x72: //toggle mode | |
254 | mode = !mode; | |
255 | break; | |
256 | case 0x73: //end-of-frame | |
257 | done = 1; | |
258 | break; | |
259 | case 0x74: //skip some blocks | |
260 | skip = bytestream2_get_byte(&s->gb); | |
261 | if ((blocks + skip) >= s->blocks) | |
262 | break; | |
263 | blocks += skip; | |
264 | x += skip * 8; | |
265 | while(x >= s->width) { | |
266 | x -= s->width; | |
267 | y += 8; | |
268 | } | |
269 | break; | |
270 | default: | |
271 | av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx); | |
272 | } | |
273 | } else { //handle one block | |
274 | int code; | |
275 | int cf; | |
276 | int angle = 0; | |
277 | uint8_t Y[4]; // luma samples of block | |
278 | int tx = 0, ty = 0; //coords of subblock | |
279 | int chroma = 0; | |
280 | if (mode || uniq) { | |
281 | uniq = 0; | |
282 | cf = 1; | |
283 | chroma = 0; | |
284 | } else { | |
285 | cf = 0; | |
286 | if (idx) { | |
287 | chroma = bytestream2_get_byte(&s->gb); | |
288 | } | |
289 | } | |
290 | for (i = 0; i < 4; i++) { // for every subblock | |
291 | code = (idx >> (6 - i*2)) & 3; //extract 2 bits | |
292 | if(!code) //skip subblock | |
293 | continue; | |
294 | if(cf) { | |
295 | chroma = bytestream2_get_byte(&s->gb); | |
296 | } | |
297 | tx = x + block_coords[i * 2]; | |
298 | ty = y + block_coords[(i * 2) + 1]; | |
299 | switch(code) { | |
300 | case 1: | |
301 | tmp = bytestream2_get_byte(&s->gb); | |
302 | ||
303 | angle = angle_by_index[(tmp >> 6) & 0x3]; | |
304 | ||
305 | Y[0] = tmp & 0x3F; | |
306 | Y[1] = Y[0]; | |
307 | ||
308 | if (angle) { | |
309 | Y[2] = Y[0]+1; | |
310 | if (Y[2] > 0x3F) | |
311 | Y[2] = 0x3F; | |
312 | Y[3] = Y[2]; | |
313 | } else { | |
314 | Y[2] = Y[0]; | |
315 | Y[3] = Y[0]; | |
316 | } | |
317 | break; | |
318 | ||
319 | case 2: | |
320 | if (modifier) { // unpack four luma samples | |
321 | tmp = bytestream2_get_be24(&s->gb); | |
322 | ||
323 | Y[0] = (tmp >> 18) & 0x3F; | |
324 | Y[1] = (tmp >> 12) & 0x3F; | |
325 | Y[2] = (tmp >> 6) & 0x3F; | |
326 | Y[3] = tmp & 0x3F; | |
327 | angle = 16; | |
328 | } else { // retrieve luma samples from codebook | |
329 | tmp = bytestream2_get_be16(&s->gb); | |
330 | ||
331 | angle = (tmp >> 12) & 0xF; | |
332 | tmp &= 0xFFF; | |
333 | tmp <<= 2; | |
334 | Y[0] = s->ulti_codebook[tmp]; | |
335 | Y[1] = s->ulti_codebook[tmp + 1]; | |
336 | Y[2] = s->ulti_codebook[tmp + 2]; | |
337 | Y[3] = s->ulti_codebook[tmp + 3]; | |
338 | } | |
339 | break; | |
340 | ||
341 | case 3: | |
342 | if (modifier) { // all 16 luma samples | |
343 | uint8_t Luma[16]; | |
344 | ||
345 | if (bytestream2_get_bytes_left(&s->gb) < 12) | |
346 | goto err; | |
347 | tmp = bytestream2_get_be24u(&s->gb); | |
348 | Luma[0] = (tmp >> 18) & 0x3F; | |
349 | Luma[1] = (tmp >> 12) & 0x3F; | |
350 | Luma[2] = (tmp >> 6) & 0x3F; | |
351 | Luma[3] = tmp & 0x3F; | |
352 | ||
353 | tmp = bytestream2_get_be24u(&s->gb); | |
354 | Luma[4] = (tmp >> 18) & 0x3F; | |
355 | Luma[5] = (tmp >> 12) & 0x3F; | |
356 | Luma[6] = (tmp >> 6) & 0x3F; | |
357 | Luma[7] = tmp & 0x3F; | |
358 | ||
359 | tmp = bytestream2_get_be24u(&s->gb); | |
360 | Luma[8] = (tmp >> 18) & 0x3F; | |
361 | Luma[9] = (tmp >> 12) & 0x3F; | |
362 | Luma[10] = (tmp >> 6) & 0x3F; | |
363 | Luma[11] = tmp & 0x3F; | |
364 | ||
365 | tmp = bytestream2_get_be24u(&s->gb); | |
366 | Luma[12] = (tmp >> 18) & 0x3F; | |
367 | Luma[13] = (tmp >> 12) & 0x3F; | |
368 | Luma[14] = (tmp >> 6) & 0x3F; | |
369 | Luma[15] = tmp & 0x3F; | |
370 | ||
371 | ulti_convert_yuv(s->frame, tx, ty, Luma, chroma); | |
372 | } else { | |
373 | if (bytestream2_get_bytes_left(&s->gb) < 4) | |
374 | goto err; | |
375 | tmp = bytestream2_get_byteu(&s->gb); | |
376 | if(tmp & 0x80) { | |
377 | angle = (tmp >> 4) & 0x7; | |
378 | tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb); | |
379 | Y[0] = (tmp >> 6) & 0x3F; | |
380 | Y[1] = tmp & 0x3F; | |
381 | Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F; | |
382 | Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F; | |
383 | ulti_grad(s->frame, tx, ty, Y, chroma, angle); //draw block | |
384 | } else { // some patterns | |
385 | int f0, f1; | |
386 | f0 = bytestream2_get_byteu(&s->gb); | |
387 | f1 = tmp; | |
388 | Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F; | |
389 | Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F; | |
390 | ulti_pattern(s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma); | |
391 | } | |
392 | } | |
393 | break; | |
394 | } | |
395 | if(code != 3) | |
396 | ulti_grad(s->frame, tx, ty, Y, chroma, angle); // draw block | |
397 | } | |
398 | blocks++; | |
399 | x += 8; | |
400 | if(x >= s->width) { | |
401 | x = 0; | |
402 | y += 8; | |
403 | } | |
404 | } | |
405 | } | |
406 | ||
407 | *got_frame = 1; | |
408 | if ((ret = av_frame_ref(data, s->frame)) < 0) | |
409 | return ret; | |
410 | ||
411 | return buf_size; | |
412 | ||
413 | err: | |
414 | av_log(avctx, AV_LOG_ERROR, | |
415 | "Insufficient data\n"); | |
416 | return AVERROR_INVALIDDATA; | |
417 | } | |
418 | ||
419 | AVCodec ff_ulti_decoder = { | |
420 | .name = "ultimotion", | |
421 | .long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"), | |
422 | .type = AVMEDIA_TYPE_VIDEO, | |
423 | .id = AV_CODEC_ID_ULTI, | |
424 | .priv_data_size = sizeof(UltimotionDecodeContext), | |
425 | .init = ulti_decode_init, | |
426 | .close = ulti_decode_end, | |
427 | .decode = ulti_decode_frame, | |
428 | .capabilities = CODEC_CAP_DR1, | |
429 | }; |